A man who was Superman is a comedy, Korean film directed by Jeong Yoon-Chul and written by Yoon Jin Ho, Yoo Il Han, Kim Ba Da. It was released on 31 January 2008 and had grossed 3,848,034$
Song Soo-Jung (Jun Ji-Hyun) works for a TV program production company that makes emotional documentary reports about people in our society. She is bored and wants to quit her job. However, when her camera is stolen, and a mysterious stranger (Hwang Jeong-min) returns it to her. Furthermore, he saved her from an oncoming truck. Turns out the hero thinks he is Superman. Because villains implanted kryptonite in his head, he couldn't use his superpowers anymore. However, there is no reason for the hero not to help everyone in his power. Soo-Jung is fascinated by the man's story and from there accompanies him as he does his good deeds. "Superman" hopes that he can weaken kryptonite by doing such good deeds that it will leave his body one day. But the seizures didn't make his life easy. Soo-Jung decides to discover this man's true identity.